John Deere 2055.06 – RLC: RLC Circuit Current High
Issue description
The electrical current draw on the circuit controlled by the RLC module has exceeded the normal operating threshold (over 16 Volts/high current), or there is a data transfer/communication problem on the CAN bus network causing the control software to register a fault.
Applies to these machines
13 machines- 6110R
- 6120R
- 6130R
- 6145R
- 6155R
- 6175R
- 6195R
- 6215R
- 8245R through 8400R
- 9470RT
- 9520RT
- 9570RT
- 6110R through 6215R
Check the cause
Inspect all CAN bus connections between the Central Control Unit (CCU) and the RLC control software for signs of damage, loose connections, or corrosion.
Inspect the wiring harness leading to the Cab Roof Module for any signs of wear, damage, or corrosion that could cause a short circuit.
Use a CAN bus analyzer to test the network for intermittent connections or data transfer issues.
Ensure there are no sources of electrical interference near the CAN bus network that could be causing communication errors.
Repair steps
Secure or Replace Connectors
If loose or corroded connectors are found during the inspection, clean, secure, or replace the compromised pins/connectors.
Repair Wiring
Repair or replace any compromised wiring in the harness that is causing the high current condition.
Update Control Software
Make sure both the CCU and RLC control software are updated to the latest versions to address any potential issues with CAN message processing.
Replace Module
If the wiring and software are intact but the RLC continues to draw excessive current, the internal circuitry of the RLC module has likely failed and the module must be replaced.
Parts you might need
(1)Cab Roof Module (RLC) / Roof Lighting Controller
When replacing the RLC, ensure the new module is programmed/configured to the specific vehicle's lighting setup (e.g., driving lights, loader flood lights, dome lights) as the RLC controls these specific circuits.
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